ZL-3047A Differential Scanning Calorimeter (DSC)

Instrument Introduction：

The Differential scanning calorimetry (DSC) technique has been widely used. The differential scanning calorimeter is both a routine quality test tool and a research tool. Measmeasures the temperature, heat flow associated with the thermal transition inside the material. Our instrument is a heat flow type differential scanning calorimeter, with good repetition and high accuracy, which is especially suitable for accurate measurement of specific heat. The equipment is easy to calibrate, uses a low melting point, is fast and reliable, and has a very wide range of applications, especially in material research and development, performance testing and quality control. The properties of materials, such as glass transition temperature, cold crystallization, phase transition, melting, crystallization, product stability, curing / crosslinking, oxidation induction period, etc., are the research fields of differential scanning calorimetry, and different models are selected according to the experimental parameters and experimental requirements.

The application scope of differential scanning calorimeter is: curing reaction temperature and thermal effect of polymer materials, material phase transition temperature and thermal effect measurement, crystallization of polymer materials, melting temperature and thermal effect measurement, glass transition temperature of polymer materials, etc.

The sample and parameters were placed into the crucible separately and placed in the furnace for programmed heating to change the temperature of the sample and parameters. If the heat capacity of the reference and the sample are the same, and the sample has no heat effect, the temperature difference is almost “zero”, and a smooth curve is obtained. As the temperature increases, the sample has a thermal effect, and the parameter does not produce a thermal effect, the temperature difference between the two, in the DSC curve, the larger the temperature difference, the greater the temperature difference changes, the more the number of peaks. Peak up are called exothermic and peaks down are called heat absorption.

The following figure is a typical DSC curve showing four types of transitions:

Temperature coefficient is →

Ⅰ   For a secondary transition, it is a change in the horizontal baseline

Ⅱ  For the heat absorption peak, it is caused by the melting or melting transition of the test sample

Ⅲ  For the heat absorption peak, it is caused by the decomposition or cleavage reaction of the test  sample

Ⅳ  is the exothermal peak, which is the result of the sample crystalline phase transition

Instrument Principle：

Material is often accompanied by thermal effects during physical and chemical changes, and heat release and heat absorption reflect the thermal enthalpy of matter. A differential heat analyzer is a function of measuring the temperature or time between the test sample and the reference under the same thermal condition.

Differential scanning calorimetry is a technique to measure the power difference between the output material and the parameter under a program-controlled temperature. The instrument of our company is the heat flow type differential scanning calorimeter, with the thermal flow difference between the sample and the parameter in mw. The abscissa is time (t) or temperature (T), increasing from left to right (not meeting this requirement shall be noted).

After the sample and the reference are put into the crucible, they heat up at a certain rate. If the thermal capacity of the reference and the sample is roughly the same, the ideal scanning calorimetric analysis map can be obtained.

Time

The figure T is the temperature curve reflected by the thermocouple interpolated in the reference. Temperature difference curve between the AH-line reaction sample and the reference. If the sample had no thermal effect, then the △T=0 between the sample and the reference showed a baseline as smooth as the AB, DE, GH on the curve. When the temperature of the sample occurs below the temperature of the sample of the parameter. Conversely, peak-up EFG exothermic peaks appear.

The number of peaks, location, peak area, direction, height, width, symmetry in the figure reflects the physical and chemical changes of the sample in the measured temperature range, the temperature range of the transition, thermal effect magnitude and positive and negative. The height, width, and symmetry of the peaks, in addition to the test conditions, the dynamics in the sample change, and the measured results are much more complex than the ideal curve.

Instrument Characteristics:

◆The new metal furnace structure has a better baseline and higher precision. The heating adopts indirect conduction, which has high uniformity and stability, reduces pulse radiation, and is better than the traditional heating mode.

◆Automatically switch the two-way atmosphere flow, with fast switching speed and short stabilization time. At the same time, add a protective gas input.

◆USB communication interface, strong versatility, reliable and uninterrupted communication, and supports self-recovery connection function.

◆Multi-stage temperature setting, fully automatic program control.

◆Industrial-grade 7-inch color touch screen, rich display information, high clarity, and easy operation.

◆The sensitivity of the instrument and the accuracy of measurement are greatly improved. Bidirectional operating system, software real-time acquisition of spectra, online data analysis.